There's a difference. A huge difference. In the very last days of the Reich, those ramming pilots had a chance of survival and they were training to ram enemy bombers in a way, that would allow them to escape their plane. A Bf 109 or FW 190 was also a fighter, that had speed and climb rate to catch enemy bomber.
Sending a Ju-87 that had minimal chances of intercepting anything and that was completely suidical against any sort of enemy opposition, that is such stupid idea. The Luftwaffe never had lack of better planes to catch allied bombers and never needed to use tactical dive bombers as bomber interceptors.
Ju-87s against bombers? Nope. Never happened. Never needed to.
But how do you know it never happen? i have the mission report from the 303rd BG combat mission operation report that state on the Ju-87
From the Journal of Vern L. Moncur, 359th BS Pilot:
"In the first wave of enemy planes, there were at least one hundred ME-109s, FW-190s, JU-88s and a few ME-110s and JU-87s", and
Comment from James S. Andrus, Moncur's Radio Operator
"This raid was the worst raid of this theatre of operations. We were bombing the Focke-Wolf
airplane factory and we sure made a mess of it. We had P-47 escorts at the beginning of the raid
and we were supposed to have P-51 escorts near the target, but they didn't show up. As soon as
our escorts left us we were hit by FW-190s, ME-109s, JU-88s and JU-87s. The JU-87 is the Stacey
dive-bomber. They appeared to be waiting on us, because when we saw them they were already
coming into the attack. The whole German Luftwaffe must have been up there, because most of the
B-17s didn't have a chance. I was looking out the hatch in the radio room and I saw the first attack
on the group behind us. It's an amazing sight to see B-17s doing down."