The M95/34s were M95 long rifles that were modified, in the mid 1930s in Austria, to the accepted M95 carbine pattern. I believe you can tell them apart from a "true" carbine" based on the rear sights. The M95/34s will retain their tall ladder sights and the "true" carbines will still have their short ladder sights. They are most likely to be chambered in the 8x56R round ("S" or "H" on barrel) and their sights would be updated to reflect that.
I do not believe the Austrians actually had a "m95/34" designation, this being a possible collector creation to distinguish the conversion.
As mentioned, you can get sling swivel differences (as well as stock differences) for a rifle, stutzen, or carbine that went through a 1930s rework, parts were swapped and rematched to make the firearm servicable again. With that being said, you can end up with some interesting mix up of parts which could be quite entertaining for an Austro-Hungarian collector.
Many of these rifles and carbines are still packed in grease from their days of being put into storage in the late 1930s so you can potentially be the first person to fire that M95 since refurbishment in the 1930s.
I have an M95 long rifle that was converted to 8x56R in the 1930s and she is an absolute pleasure to shoot. Newly made 8x56R reloading supplies are also avaliable for the first time so reloading has become much easier.
Very well made and very simple to take apart and care for, they are undervalued in the market so grab them before demand catches up.