When you shove with K10 you have fold
equity. Because the other player dont know with what hand you are shoving, he considers top 10% range and can easily fold the winning hand. Thats why shoving with a wider range is still +ev. Cause winning blinds and antes come into play.
Calling a shove with K10, you dont have fold equity, you cant win just blinds and antes, your only way to win is by winning the hand, so thats the reason you are calling with tighter range!