Well the diffrerence is really obvious, Wagerr which I believe comes from the word wager which means bet. You are betting whose athlete or player that are going to win in order to receive profits. More like a gamble thing.
Where SportyFi is a crowd source campaign which mission is to support athletes that has potential in the future but doesn't have enough financial capability to move further towards success.
It's more like a donation program (as per my understanding) w/ a mix of investment. Think of the athlete that you support like a STOCK/SHARES which will eventually grow or mature as he/she moves to the PRO ranks.
Not only you'll help athletes but you also receive rewards from your investment in return. It's a win-win situation in a long-term standpoint.