I don't have either but after reading the specs from the glossy ad Canon just sent me, I would prefer the T5i.
I have four older Rebel models and can testify to thier ability. The SL1 has slightly less featuers and is smaller. I prefer the larger Rebel body.
I don't own them but from the reviews, they are both equally well received:
You can also compare the features:
which seems to say the same thing.
For me, it all comes down to form factor. I would go with the T5i, or even better the T4i, since I prefer the traditional form factor camera. Maybe try them out in a nearby store and decide which one feels better.
I found that the best choice was actually the 60D which is the same price as the T5i. I have no idea why Canon decided to sell the Rebel T5i for the same price. They are in completely differnet classes. But if you really want one of those two Rebels I would go for the T5i unless you have very small hands 🙂 Good luck!
Certainly the T4i is a another consideration but it is a discontinued model. You can still find them and if it is a couple hundred cheaper, I too would opt for it.
The T4i had body covering issues, as I recall, and may have prompted it's demise in favor of the T5i. I don't have either but my son does have a T3i. I can verify it is a nice, capable camera, indeed.
09/26/2023: New firmware updates are available.
08/18/2023: Canon EOS R5 C training series is released.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
03/30/2023: New firmware updates are available.