By this I mean if I can use them both, if i need to remove the no telemetry one and how the implementation is done (is it just copy pasted from the other mod? is it a rewrite? is there any difference on how much it's blocked?)

You don't need to use them both, this one has an anti telemetry measure implemented.

View the implementation here

Yeah, you don't need both. But they shouldn't conflict if you install both, so you can include both in modpack if you want to support that mod as well, for instance.

My implementation, which @Daxanius kindly referenced above, is a bit different from what No Telemetry does, but it ultimately achieves the same thing - none of the data it tries to collect by default is sent anywhere.