I have used an assortment and have found that most will cut the latex cleanly,...even some very inexpensive scissors. I do prefer sharp-tipped scissors that can be easily slipped between the latex layers. Rounded ones will work,...just a bit more difficult to work with. You certainly don't have to spend a lot of money on scissors that will do the job. There are many.
I personally carry some small, inexpensive scissors with me in the field so I can modify calls when hunting if the need arises. I will also, at times, carry enough call making materials with me to make a call or two in a pinch,..or if I am just bored and passing time.