Who would you rather have? (Jaylen's FT% is the only thing that worries me)
What type of league? (not that I think it matters...).
Myles by a Mile.
According to Yahoo:
Jaylen Brown Averaging: 46%/59%/1.7/14.6/5.9/1.3/1.0/0.3/1.7
Myles Turner Averaging: 50%/77%/0.9/14.4/7.4/1.7/0.4/2.4/1.5
Jaylen Ranked:156
Myles Ranked: 30
Despite Myles percentages being better it comes down to some simple logic.
Jaylen has slightly better threes and steals. Myles is leading the league in blocks (by average)
You can find threes and steals elsewhere. You cannot replace Myles 2.5 blocks per game.
Turner has no where to go but up on those current rankings too not even close
Are you sure you meant Myles Turner? They're not even in the same league in fantasy.
I had to double check to make sure you meant Myles and not Evan Turner. Myles Turner is an early-round asset while Jaylen Brown is a borderline drop.
I'm going to go out on a limb here and speculate that maybe this is your first year playing and that someone is trying to MAJORLY take advantage of you and has somehow convinced you that this is a fair trade. I'm going to assume you're the Turner owner. If any of this is true, you REJECT, REJECT, REJECT this trade, and respond by sending the other owner a trade offer of your worst player for his 3 best players.