i reckon decarbing it would make it a different high but as for stronger i dunno i always just dry mine and freeze. to each his own an all that.
If it's intended for oral consumption then it would need to be decarbed at some point before ingestion, it makes no difference when this is done (drying bud before or hash after).
If it's only intended to be smoked then it doesn't really need decarbing.
The definition of potency is "the amount of any given substance needed to produce a determined pharmacological effect", you can't make it produce more THCA than it's genetically predetermined to produce but you can make the hash intended for oral consumption LESS potent than it should be by not decarbing all the THCA to THC before ingestion. If you get my drift, lol.
"Different high" is actually a very interesting idea because nobody knows anything about the relationship between decarbing and the other cannabinoids, that's quite deep a discussion topic right there.