Functionally they are the same, the 44 is faster and has built in wireless bridge to your router but if you have the HR34 already it should already be connected to the internet. I have an HR34 and it works very well, it's not as fast as the 44 but it's also not slow. If you already have a 34 you probably have recordings on it that you would likely prefer not to lose. One more installer at the house. Yes boot time is faster, but I don't need to re boot my receivers on a regular basis during normal watching hours. Final reason: They are not available.