These are two strategies I’ve implemented with great success as well. I really like this approach. You can put more into each workout, without burning yourself out.
I very often do this. I don’t like working 2 diffrent bodypart in 2 sessions in 1 day. But I often do some work for the same bodypart split into 2 workouts - one in the morning and one 6-8 hours later.
I found this to work very well for bringing up lagging bodyparts as well as for strength cycles.
I would typically do it like this:
Morning: Heavy low rep work, explosive lifts. E.g. Push presses for a very high volume of sets. Like 15-20 sets of 3 resp, ramped up over 8-9 sets, then some waves. No grinding. No work to failure.
Afternoon: Higher reps and more isolation work. Like 4-5 exercises performed as a circuit (8-12 reps each set).
Or, what I found to also work well, is doing a workout in the morning (any style) and an excentric-less workout (sled, prolwer) in the evening.