He probably has secondary positions where he is by far better than the 2500 guy. Lets say
Mick jager. 2500 trade score
40/92 rde
38/84lde
35/82 dt
Bon jovi. 3000 trade score
40/90rde
38/89lde
37/88dt
In this particular choice id take bon jovi (fictional player u guessed ritgh) as he will be really usefull in case of injurys by exemple..
But thats still just my opinion