No change. Same chances.
But I got Grimm on a 1st summons & Hansel on a first summons so I could save the extra 4600 gems ( 2300 x2 ) for next time. There is always a next time.
Discount for 10x sucks except for using 3* feeders to bypass slow Hero XP per hour of training camps.
==Equations==
( 7560 XP / 162 XP per hour ) = 46.6666 hours of Extra low cost training
Or
( 46.6666 hours x 3600 seconds per hour ) / 2600 gems = 64.6 seconds per gem.