Knox - just a few thoughts on this. Essentially - the two bodies are the same camera, but with some very minor differences. The obvious one is the inclusion of the Top-Deck LCD on the 77D, but, in order to do that, Canon had to make some changes. First off - the screen is much, much smaller, than the ones on the EOS XX series (50D, 60D, 70D, 80D) … and - ever since the 60D, the buttons have lined up corresponding to the display segments (don't think they do on the 77D) and, of course - the switch has been moved over to the left - behind the Program Dial (as on the 60D, et al) instead of being just behind the Program Dial on the right - as it is with all Rebels. Also, you have Stabilized Video - in the 77D - a God's Send - which you don't have in the 80D - a BIG plus. There are also some other minor control changes. There are many, many comparison tests already available on the Net - comparing the two models. Many put the T7i ahead on sharpness, and reproducing fine detail, but the faster processor - may actually obscure some of that. Basically, what it comes down to is this - go with the T7i - and you have a seemingly more capable camera, with the red Rebel legend on the outside of the body, or - forego that luxury in favor of the top LCD screen - which you will have in the T6S or any of the EOS XX series. But do note - the T6S/T6i is a bigger body than the 77D/T7i, and has only 9 Focus Points, whereas all the later models have 19. If money is your main concern, however, the T6i/T6s (refurb.) may suit your needs better. If a well-laid-out top-deck screen is your primary objective - the EOS 60D (sans Touch Screen) or the EOS 70D (with it) may be a more suitable choice. And, with the 90D on the horizon, with a rumored 30-32MP sensor, it might be more advisable to wait (but the price will be up there - around $1200-1300.)
Extended thoughts, relating to the switch movement. I have two Rebels - T3, T4i (first w/ Touch-Screen) and they are both easily maneuverable with the right thumb (I'm sure you've noticed that, too, Knox) but with the switch on the left - switching the camera on and off - becomes a two-handed operation. This does - sometimes - slow down your response time, particularly, if you're in the habit of continually turning the camera OFF, immediately after making your exposure, in order to conserve the battery. I must admit it doesn't much matter with the 60D (lacks Touch-Screen) as the battery lasts approximately 1150 shots! But, all the more recent Canon DSLRs will provide much less, as they ALL have Touch-Screens, now - which significantly reduces your total exposures. Again, this is yet another factor you might wish to consider, Knox. I just took out my 60D yesterday, on my walk, and I am much impressed by it, once again (I usually take out the T4i, or another) AND even used it with a NON-IS AF lens (Tokina 16.5-135) and was bowled over - literally - by the images - so much better than I get with EITHER of my Rebels - both of which - have stabilized lenses. But, doing the on/off on the left - IS - just - a little tricky!!!
Knox - just a few thoughts on this. Essentially - ... (
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