Equipment do NOT have any effect on how many SPs you have to put in a skill .
I'll use your example : Speed at 57 -> 63 , would make how big of a difference ? that's right , NONE .
Think about it .
If it had a difference I would still buy the equipment , and whenever I leveled up and wanted to add SPs I would remove the equipment , put the SPs in whatever and put equipment back on . Would make no sense if you had to do that every single time .
Edit for spelling
