Are brand pumps like LA Pump worth it?

I’ve been looking into getting an elliptical cylinder by LA Pump since I heard using it leads to slightly stronger (and potentially faster) development of width compared to height, which is something I am interested in.
However the cylinder has a pretty hefty price point at about 130€ and doesn’t include their own brand pump, which would cost another 100€.

Now, unless LA Pump uses a proprietary connector for their pumps/cylinders, wouldn’t it be a decent idea to simply get a cheaper one from somewhere else?
Or is it in your opinion worth it to spend the money on their pump?

I’ve never had an LA pump, but they look very much like leluv pumps. Leluv is high quality at half the price. I’ve owned one and getting another.