Use them both but plan to sell the elder. Assign skill points to the last column if you want your older (really all) players performing.
Expressed above is my own opinion. ☻ Your results may vary.
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[SIGPIC][/SIGPIC]
if keeper just sit`s there and does nothing it means rest of players are doing their job so they will get lower rating, the higher rating means he`s had some work to do because rest of squad are not working hard enough, myself i`d rather have low rating for Gk means team working well to stop oppo scoring