I am wondering the exact same thing. The Gain is a lot cheaper than the Creo, but reading some user experiences it appears (but I'm not sure) that real world range of the Creo is longer than the Gain. I read an article in Road Bike Action that said the motor on the Creo is unusually efficient. It's over 80% efficiency from a cadence of 60 to 110 and it peaks at around 84% efficiency at a cadence of 100.
How efficient are hub motors? I guess the other factor is that the battery in the Creo is bigger than the battery in the Gain.
If the cost were the same between the two I think I'd go for the Creo, but given the significant price difference I'm considering the Gain as well.
The conversation is getting too bogged down in esoteric and vague statistics about power, weight, and battery efficiencies that misses the whole point and distorts what Orbea's true intent was bringing the GAIN ebike to market. I've owned the M20i Limited version (full carbon,Ultegra Di2, and Mavik Cosmic Pro carbon wheelset), for more than a year and couldn't be happier. The bike does precisely what the iconic Spanish bike maker Orbea says it will do, ENHANCE the ride, it claims to do just that and nothing else. It was designed specifically to mimic the classic road bike aesthetic, feel and handling with enough power assist to make climbing and riding into a cross/headwind a bit less daunting and accomplishes all splendidly. If it's a moto some critics are looking for, something to do ALL the the work, then buy a scooter because that's really want they want anyway. I myself split time between my GAIN and a conventional Lynskey Helix Pro Ti road bike, of course they feel and perform differently but I enjoy riding both and the GAIN in particularly when now at 66 yo the goal is to continue cycling as a fitness and high quality exercise activity. What are the expectations not being met when Orbea's GAIN was crafted specifically to provide a traditional roadie options when scant free time, longer distances, and/or age erode cardio vascular endurance and strength. My 40 years of serious riding includes road and track competition, endurance events, commuting, Sportif's, MTB trail riding, and now some gravel and the GAIN is another tool in the bag to keep me on the bike doing a thing I love. Competition in this market segment has exploded in the year since I bought my GAIN and there are a number of very good options available now that weren't to me when I was in buying mode but then that's the way it is now. I advise caution when looking at anything Specialized since virtually all Specialized technologies are proprietary and while there is no industry standard for ebike motors, your service choices will be limited exclusively to Specialized dealers. Consider pricing too, the new Creo Turbo SL comes in at a whopping $13,500 list, S Works territory there, even a downgrade version in the vicinity of $9,000 is out of my price range. So we all know you get what you pay for and while Specialized is a top flight bike maker with a rabid following here you have to ask yourself are you really. I wouldn't think of the GAIN as settling on a lesser choice, the bike is an excellent option so long as you know and understand it's capability and what exactly it will do for you.