Fritzbox 6660 vs. 6591 Differences and Similarities

Technical Specifications of Fritzbox 6660 vs. 6591 Comparison

The following table provides a quick overview of the essential differences between the Fritzbox 6660 and 6591.

Flat Design of the Fritzbox 6660

Angular Design of the Fritzbox 6591

Operation, Functions, Operating System

Basically, both cable routers have the same functions. They establish a connection via the cable network and serve as WLAN routers with DECT telephone and smart home base.

In detail, however, the two devices differ very clearly from each other.

The Fritzbox 6660 comes with its own operating system FritzOS 7.57 [as of 05/2024] while the 6591 can only be updated to version FritzOS 7.20 at most.

This means the 6660 has the latest functions, while the 6591 still uses a somewhat older operating system.

Connections and Power Consumption Fritzbox 6660 vs. 6591

When turning to the USB connections in the question "Fritzbox 6660 or 6591?", one finds that the 6591 has two USB 3.0 connections, whereas the 6660 only has one USB 2.0 connection. This makes file transfers on the Fritzbox 6591 ten times faster and enables even faster use for NAS systems or printers.

You'll search in vain for an ISDN connection on the 6660. However, the 6591 has one on board. This allows for more voice channels than with an analog telephone system and operation with multiple different phone numbers is no longer a problem.

The Fritzbox 6660 has a power consumption of maximum 34 watts, the 6951 reaches a maximum of 27.5. For those who value lower electricity costs, the 6591 is the better choice here.

Transfer Rates and WLAN Range

Both routers provide high WLAN range, but the 6660 with its AX WLAN module that supports Wi-Fi 6 and achieves speeds of up to 2400 Mbps compared to measured maximum 1700 Mbps on the Fritzbox 6591, is clearly ahead.

This enables the Fritzbox 6660 to provide faster data exchange.

Both routers can be used simultaneously in the 2.4 and 5 GHz range. Thus, they are equal in this area.

Hardware

While the 6660 contains a 2×2 antenna array that cannot fully illuminate the room, the 6591 has a 4×4 antenna array that can cover all three dimensions of the room.

This promises better coverage and thus better reception for the 6591.

Dimensions and Weight

The newer 6660 version has the housing of modern DSL boxes and therefore appears more curved and flatter than its predecessor. It also lies flat on the surface.

The 6591 has a more angular housing and stands upright at the desired location.

The Fritzbox 6591 comes with a weight of 1.8 kg. In contrast, the 6660 is almost featherweight. It weighs just 617 grams.

This makes the 6660 definitely easier to move and transport.

Price-Performance Ratio

The price of both routers varies greatly (as of 03/2022). The Fritzbox 6591 can currently be purchased at a new price of approximately 260 EUR. This puts it well above the 6660, which is currently available from approximately 190 EUR.

With the Fritzbox 6660, you get more value for your money in terms of price-performance ratio.

Customer Satisfaction Fritzbox 6660 vs. 6591

In terms of customer satisfaction, both products are relatively equal.

The Fritzbox 6591 on Amazon with 4.8 out of 5 stars from 3250 reviews is slightly ahead of the 6660 with 4.5 out of 5 stars from 2950 reviews.

Customers positively highlight the outstanding WLAN speeds of the Fritzbox 6591, while customers notice a more unstable connection and a step backward with the 6660.

Generally, the rating of the 6591 turns out a bit more positive than the general opinion of the 6660.

Conclusion of the Fritzbox 6660 vs. 6591 Comparison – Which Model Should You Buy?

When looking at all functions in detail, the Fritzbox 6591 can score points due to better coverage, power consumption, and connections. However, the 6591 achieves a worse price-performance ratio compared to the 6660.

The latter scores with Wi-Fi 6 and fast transfer rates. Those who depend on USB 3.0 and an ISDN connection are well advised with the Fritzbox 6591 as a cable router. The [url="https://www.amazon.de/dp/B07R74THC4?tag=produck-21",name="Fritzbox 6660",title=""] appears in comparison as a cheaper but faster cable router variant of the Fritzbox 6591 that offers all essential connections. It is therefore the price-performance winner in our comparison.