Sometimes heart must rule head! I have the E180rs ( 2020)..........looks identical apart from the top tube to seat post additional frame member. It took me quite a bit of time to get the bike to ride like I wanted it to but love it now and would never sell it...................EVEN SO..............back in June I bought the E160 RSX and I do not regret £1 of the money spent. It is trully a very special bike. I have no experience of the E150 but I can guarantee the E160 RSX is very different. I have yet to really understand why the RSX feels so different given the Geo is a ctually very similar to my E180RS but whereas the E180 is primarilly a downhill specialist the E160 RSX does it all............mellow rail riding, fast singletrack, jumps, climbs, drops, fast downhill and only falls short of the E180 on really gnarly gravity stuff............still capable but a rougher ride! The thing that bemuses me about the RSX is why it is so easy to ride it well yet at the same time it seems to keep asking to be ridden faster!! I have had to do nothing to it except put higher rise Deity bars on it ( same on the E180), convert to tubeless...... and I also retro fitted a Kiox 300 ( 2 minute job). The spec is essentially what I would select for a DIY build and Whyte have even made the battery removal/refit easy now using a Bosch design rail system, whilst still avoiding the problems of open faced downtubes and locks etc.