It just depends on how you use your jig saw. I have both corded & cordless Carvexs in my work truck & shop. I cannot think of the last time I used the corded Carvexs. There are differences in how they operate, but not enough to out weigh the convenience of the cordless.
Remember, you can get the cordless Carvex & try it out for 30 days. If you do not like it, return it.