$ $ $
One thing I forgot to mention...
Sometimes economics weighs in as a factor.
Couple of years ago, my first LNB was an Invacom, and the model I chose only came in Universal.
Standard would have been fine, but no such animal.
Recently, I bought some $7-10 LNBs for experiments, and they only came in Universal.
Another down-side to the Universal, and a place some beginners trip up, is that to get the usual birds, you must turn on the 22khz tone to select the proper band.
Well, if you forget, you might be out there all day, waving your LNB around at the sky, wondering why it's so deaf!
Oh, and both the above mentioned LNBs were single output, too.
To get two output or Standard, I'd have had to spend more.