i got hoda to 5 stars, then got wampa to 5 stars, and now i'm going back to hoda 'til he can be 7 starred. I know, this isn't efficient... but i guess i really wanted to try wampa. I geared wampa up as much as i can, (more than my hoda actually since i find hoda does fine even at gear 10 since nobody actually tries to kill him), and now i'm not sure whether the extra 2 stars will really make him that much better....
oh well, i like both and they both have long term potential i think, so just entirely up to you. I like unlocking toons. but recognize that hoda probably is likely to be more needed for the future than wampa