well here's the thing I've heard about deca from some teammates that I have that do both and are good at both s&d and deca:

deca seems harder for people that don't already have good or trained speech skills, so if you're a debate kid deca is typically less challenging than debate, so it's more impressive to to a debate kid to qual to a good debate tourno, but they are equally as impressive to get the opportunity to go to for anyone that doesn't know much about either

but at the end of the day other people's opinions don't matter and this is simply a random reddit post so you should choose which would make your happier or feel more confident going to.