As far as I know they are 2 different engine type. I only know the axio packs the vvti with a little advancements from the vvti from the 121 which is very good on fuel. Owned both the models & on fuel both of them are identically good. but if you consider the comfort & build quality, 121 & the said axio are both cheap plastic crap with harsh seats. They clearly reflect the fact they are made as budget cars made in japan. compared to these 2 the said corolla is better in comforts as well as the build quality. But what I've heard is the resale value is not good for the 141 corolla & it can't be cashed as easily as the axio. yet again, during the high peak of priuss' in LK it took me 3 weeks to sell a prius in mint condition while the cefiro advertised in the same time sold with 2 days. So I guess the resale is pure luck & finding the proper buyer. Good luck bro