I own both and they gripp pretty tight. Both platters came off just fine hen I applied sufficient force to lift the platters. Only thing you have to worry about is keeping the platter absolutely vertical. Most of the SP-25 and SP-15 that I have seen have a table that is not horisontal, I find the center bearing is not point in the right direction, 90 degrees off the bottom like it should. I find the SP-15 is usefu for the 3 speeds it offers, but the SP10MkII is better as it is more sturdy, and also there are designs out there that allow for pitch shift.
The SP-25 is only for the one who is not put off by the 2-speed and 15/25 for the lighter weight of everything and the fact that neither is as sturdy as the SP-10MkII.
The SP-25 is only for the one who is not put off by the 2-speed and 15/25 for the lighter weight of everything and the fact that neither is as sturdy as the SP-10MkII.