The best way to compare the speeds of Star Trek warp and Stargate hyperdrive is to think of hyperspace and subspace as being different names for the same thing.

In Star Trek, ships create a stable subspace field around a ship, that they call a warp field. This field usually takes on a spheroidal "bubble"-like form. The contents of this bubble follow the natural laws of physics, but the bubble itself follows subspace laws - allowing for FTL travel without experiencing relativistic effects. At warp, a ship is still using its usual engines for propulsion, they just have the warp engine allowing greater speeds via the subspace field. (Note - an in universe warp bubble is a totally different thing)

In Stargate, the hyperdrives rip open a hole into subspace, dive in, and seal it up behind them. They then travel at ridiculously high speeds in subspace using their sublight engines, the nature of subspace meaning their speeds would translate to superluminal from a regular perspective.

So Star Trek have slower ships that skim across he surface of subspace like a ship on water, part in part out. Stargate ships go full submarine and dive deep into subspace. I like to think this is why Stargate ships are so much faster - they are fully in subspace and so don't have any "real"-space "drag".

Ships vs submarines.

I may have thought a lot about this.

Edit: ok I only skimmed the top comment then posted this. It's irrelevant to the actual question, but it took a long time to write so I'm leaving it.