First up, you are mixing up terms.
Compound exercises are those where two or more joints move, eg bench press (shoulder and elbow) and squat (hip and knee).
Isolation exercises are those where only one joint moves, eg curls (elbow) and leg extensions (knee).
Full-body routines are where the person trains everything in one workout - eg bench press, squat and deadlifts combined with 30 minutes on the treadmill. But usually people saying "full-body" will mean just resistance training, not cardio stuff.
Split routines are where one aspect or part is trained on different days, eg fullbody resistance training on Mon/Wed and cardio on Tues/Thurs. However, usually when people here speak of "split" routines they mean splitting the weight training up, eg Monday chest/shoulders/tris, Wednesday back/biceps, Friday legs.
Isolation exercises commonly go with split routines, otherwise you'd just have one or two exercises in a workout.
Now, as to me... years ago when I did it I did lots of isolation exercises and compounds both. I got routines from Flex magazine and didn't really understand them, so there were 8 exercises for biceps and 12 for chest and 11 for legs, well I did them all. Used to spend 3-4 hours in the gym. I grew a lot - for three months or so, then stopped. I wound it back and did isolation stuff, didn't increase much in strength or size. The training was broken up a lot by work, though.
Then this year I went in and got given a routine of isolation exercises, I did them and grew, but not much. However I could barely remember all the exercises and had to keep waiting for machines and things so didn't have much intensity.
Then I switched to my own routine, did compounds for my upper body and not for my legs, since all the leg compounds involve your lower back, too, and that's a problem for me. So I did isolation work for legs. My upper body grew and my legs didn't. Then I said, "fuk it" and did compounds for legs, and now they're growing.
Fact is, in the first three months or so of training an unfit and weak person, almost anything works if they do it hard and stick to it. It's just such a shock to your body that you're actually training it that it responds. After that... compounds for a couple of years. After that, well it depends on the person's goals.