You get plus and minuses with each. Amendola could run great routes and catch the rock, but he was much more quick than fast. We have seen him run down from behind way too much on plays Tavon would have taken the distance with ease.
Tavon struggled with his numerous roles early on but has been rounding into shape lately. Up to now, his only exposure to an accurate NFL QB has been Sam the ex-Ram. Now he gets someone who is better than Sam with touch passing. Tavon can continue playing part-time RB, but the presence of Jerad will allow him to line up outside and use his speed & quickness downtown, especially when The Express! is rumbling, and DC's are afraid to pull too many out of the box and give Todd more advantage.