Technically speaking, most GPS receivers will work fine inside an airliner as long as there is an external antenna on it stuck to the window. It will see poor satellite geometry, and that will add more position error. Legally speaking, GPS receivers have been banned on every airliner that I've been on since 2001.
I can't figure out why any North American-based GPS user would want to get GLONASS reception. Historically, it has been very unpredictable.
Most consumer models use very similar GPS chipsets, so the reception sensitivity is very similar. What you may really be interested in is the ability to lock on and stay locked on various satellites when you are deep in the woods. In the springtime, lots of trees have lots of leaves with lots of water inside. They effectively block GPS signals. In some cases, the leaves act as signal reflectors, and that will set up a multipath interference situation in the receiver, assuming that the receiver is using a typical patch antenna. With a better external antenna, that problem can be mitigated as well.
Due to the similarity of consumer models, you are almost better off selecting a model based on the software user interface at the computer. Normally you do certain tasks at your computer, then transfer the results to the receiver and use it there.
I started using GPS receivers both professionally and for outdoors fun in 1994.