Some days ago we got our new Banana Pi (BaPi) I tested both Raspbian and the new Bananian (pure Debian except the modified kernel), they work fine with the Raspbian drivers you can download from the INDI page. The performance is much better than with RasPi, I get more than two times more images (using 0.01s exposure) from BaPi than from RasPi when I use our QHY5. Also the Network (Gbit) is very fast. I also compared with a Notebook (Core 2 Duo 2,4GHz, 8GB RAM, Fedora 20), there is no difference in performance while RasPi is much slower.
There will be a detailed report on telescope remote control using Banana Pi, INDI and KStars in near future, also as a tribute to Lemaker who sent us ( astronomy group of University of Marburg, Physics department) the BaPi for free to perform the tests and get a remote controlled telescope for measurements.
Information on Banana Pi www.lemaker.org/
RasPi B+ is mostly the same as RasPi B. Just some improvements and more USB ports, but not faster. Banana Pi is completely different, it uses an Allwinner A20 Dualcore ARMv7 with 2*1.0 GHz, 1GB RAM, GBit Ethernet. As INDI executes the drivers seperately it makes uses of both CPU cores. For us at university the Banana Pi is the much better solution due to the better performance over network. And no overclocking required. BaPi consumes less power although it is more powerful.
Depends on the use case. For example when we want to get a "live" view of the sun we need a fast enough computer. BaPi is fast enough for this, RasPi is much slower. For use with lower frame rates, for example photography at night, the RasPi is enough in many cases