It’s an interesting question, I’m actually curious on this now too. I’d say the difference isn’t too much though, because jump spell problems can be avoided
Value of pieces

It depends a lot on the stage of the game. Rooks with jump are very powerful in the endgame, more so than bishops, especially when the opponent no longer has jump.

knights are neutered
knight checks cannot be blocked, which means that you can often force an opponent to answer your freeze + knight check with a retaliatory freeze spell, leaving them open to a coordinated attack (Nd6+/Qf7# for instance). additionally, it's an advantage to check from a distance in order to stay out of range of a freeze/capture, it's easier for a knight to check while avoiding the frost nova (lol) & really, don't knights get a free jump spell every move?
knights are neutered
knight checks cannot be blocked, which means that you can often force an opponent to answer your freeze + knight check with a retaliatory freeze spell, leaving them open to a coordinated attack (Nd6+/Qf7# for instance). additionally, it's an advantage to check from a distance in order to stay out of range of a freeze/capture, it's easier for a knight to check while avoiding the frost nova (lol) & really, don't knights get a free jump spell every move?
To some degree, I agree. Knights already benefit from a jump-like effect, and if a knight coordinates with a longer ranged piece, then the frost spell loses much of its power.
But coordination can be used by any pieces. A queen and bishop combination, one I've found to be extremely powerful in the early game, will almost always have the queen and bishop too far away to both be frozen.
The biggest problem I found with the knight is that the jump, which gives the knight a useful niche in normal chess, is now shared with the queen, bishop and rook. The knight isn't entirely useless, but it hasn't gained much compared to other pieces, which is why I felt it was worse.
Spells affect the mobility and power of pieces drastically, bishops, rooks and queens become monsters while knights are neutered. Long range pieces can coordinate without being frozen together. Combined with the reduced length of games, I wonder how the relative values of pieces change. Please post your own ideas for this below, with reasons.