Sherpa Mini VS DDB vs Biqu H2 V2S

Hi, so It's been a while and I've decided to tinker with my Ender 3 Pro again. Mainly because the print quality has gone worse and I finally wanna throw out that annoying bowden tube that's been here for... Wow, 4 years now.

Anyway, since I'm a student I don't have all the money in the world and I want the best performance a buck can offer. So I've been looking at Aliexpress and TriangleLabs a bit and came down to the three most powerful extruder kits for under 80 bucks.(I live in Croatia so the VAT is 25%)

Sherpa Mini, which I chose because it's lightweight and fast extruding (77€ ALL KIT)
DDB, which I chose for high driving force and precision (65€ ALL KIT)
Biqu H2 V2S which I chose for ease of use and overall great reviews (64€ WITH FAN)

Now, the competitor of the DDB version is the Biqu, and the Sherpa is just here for me to see if that extra 10$ is absolutely worth it compared to these 2.

Right now I'm using a stock Ender 3 Pro MK8 Bowden standard setup, the only thing I've modified are the fan ducts, so I am assuming this would be a massive upgrade nonetheless, but as I said I want the best for my buck, because I do NOT plan on upgrading my extruder setup in the near future, planning on going for linear rails so I really want the extruder to last and be performant.

The things I print need precision and quality, I'm a parametric designer in Fusion360 and I make chassis models for Arduino and ESP32 project setups.