BYA and Nachlas I think are pretty much the same type. BYA might have more of a good name (in shidduchim) being that its around for ages. Tiferes is more yeshivish or so they say.
I went to BYA- I wouldnt say that it was easy on the workload but I guess compared to BJJ it was. But let me tell you there was still plenty of work. And they have great hashkafah classes there with excellent teachers.