Save yourself a lot of hassle and go with the same brand & model. By doing so you'll avoid having to remount and mess with the drain & sink connections. Save the old power cord so you don't have to buy a new one. You'll need to do some very minimal wiring work to pull the wires from the terminals in the old disposal and attach them to the disposal. Make sure to attach the green grounding wire to avoid getting shocked when you switch on the disposal!
First, is it loud or quiet? It really depends on which review you read, apparently. I believe it depends on more than that, such as what kind of sink is it being installed under - a stainless steel or a porcelain coated cast iron sink? One is very thin and flexible and will not block out as much noise or damp vibrations as effectively as a heavy cast iron sink. I have found the overall noise level to be a lot like the Badger 5 that I replaced. My wife thinks it sounds a bit different but neither louder nor quieter. It also depends on whether this is your first disposer (it is certainly louder than not having one) or a replacement. Bottom line, it's typically run for a few seconds, with the water running too, as you are cleaning up after meal (not in the middle of the night when everyone's trying to sleep) and it's no louder or quieter than the rest. I wouldn't let that be a deciding factor unless you have different criteria. If so, you can pay twice as much for that other "Elite" one by another manufacturer that is CR-rated as the quietest one. In my case I couldn't justify the added cost.
Use a wet-dry vacuum cleaner to remove any smaller shards of glass. Simply hold the opening of the hose over the top of the garbage disposal and allow the vacuum to run until you can't hear anything be sucked up anymore. If the sink isn't particularly wet, you can use a regular vacuum, covering the end of the extension tube with a nylon stocking secured with a rubber band.

To fix this problem, turn off the disposal, fill the sink halfway full with soapy water, and use a cup plunger to plunge the kitchen sink for 30 seconds to one minute. If you cleared the clog, the water in the sink should start draining at a normal pace again. If you’re still have issues, you might have to remove the P-trap under the sink to get at the clog with a snake.
She knew about the service call fee. The 4 On Your Side Investigation found that’s a common fee. Consumer Investigator Jodi Brooks called around to try to get an estimate from private plumbers for a garbage disposal replacement. None of the businesses we called would give an estimate over the phone. All of them wanted to look at the situation before committing to a price, and all wanted to charge a service fee to come out. Brooks found only one plumber who would come out without charging.
If your garbage disposal is making a clicking or rattling sound, there may be some food particles that will not grind up inside. Remove power from disposer, reach into the sink hole with a pair of tongs and remove anything that is still down in the disposer. Test your disposer to be sure the noise is gone. If not continue troubleshooting your disposer issue (see below).

Garbage Disposal Replacement