5D Mark IV and the EOSR (which I still own).
I've loved the EOSR since the day I bought it, I love all the new benefits of mirrorless, especially the EVF, exposure simulation and focus peaking. The only disappointment for me with the R was the slightly slower frame rate when in Servo mode, when I'm doing running photography, I obviously haven't had a chance to test the R5 with sports yet as everything is cancelled but I'm sure it will be amazing.
I've only used the R5 a couple of times so far but I love it, the extra megapixel count is really noticeable especially when cropping in during post. I took it down to Liverpool last night and had a quick walk around the waterfront and my initial look at the pictures made me smile.
The return of the joystick and the click wheel on the back is also a massive improvement on the R.
I was chatting to another photographer whilst there and she was talking about the weight of kit, she couldn't believe how light the RF 100-500 was, and the RF 70-200 compared to her EF version. That for me is the big win, weight. When I go for a camera walk I never know what to take and therefore almost always end up taking most of my kit
Last night I took most of my RF lenses - 50mm, 15-35mm, 70-200mm, 100-500mm. Only left the 35 and 28-70 behind.
I only used the 15-35 and 100-500 so could have left the rest at home but even with all those lenses once my bag is on my back, plus the tripod, I can walk for miles with it (and I suffer from a chronic bad back after surgery due to a slipped disc).