DDJ FLX4 vs Kontrol S3 mk3?

Looking to get my first DJ controller under 500 euro and deciding between these 2 as my main choices. At the moment, I’m just playing in my bedroom and at house parties, but it would be cool to get into playing clubs or bars down the line. I like to play a mix of Latin music (reggaeton, guaracha, baile funk, urbano) and techno with some other genres like eurodance or DnB sprinkled in. My thought process is that since I spent a year learning and performing on my roommate’s DDJ 400 and Pioneer/rekordbox is the industry/club standard, the FLX4 would be a natural choice. But I also considered the kontrol s3 because of the 4 channels, which is appealing since I feel like I could get more value long term by having a controller I can grow into and not have to upgrade. But, I also am unfamiliar with the traktor software and don’t want to be locked into the NI world.

TL;DR I’m really just wondering if the S3 is worth the extra 150€ over the FLX4 for the additional channels and features, as well as the trade off of switching from rekordbox to traktor.