After an initial tricky spell in the north-west, the former Newcastle No.9 is starting to make an impact. He scored in the FA Cup final against Chelsea last weekend and the good form continued as Carroll starred in Liverpool's comprehensive 4-1 league victory over the same opponents on Tuesday.
"All the time I was at Liverpool and he was at Liverpool he was never drinking or doing stupid things. He looks after himself," Comolli told talkSPORT.
"He's a much better player technically, his runs are better, he's very fit, his lifestyle is very good.
"It's part of an education process. When he first came to Liverpool the staff got hold of him and said, 'This is what you have to do if you want to get to the top'. He totally grabbed it and ran with it.
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"You can see the effect at the moment and I think it's just the beginning. All the stats prove that strikers, especially target strikers, peak when they are 26. He's 23.
"He's got so much more to come, it's incredible. I think we are only seeing the beginning. He's intelligent, he's dedicated, he listens, he's got a good lifestyle. I don't see why he shouldn't be a success."
The early season struggles of new signings Andy Carroll, Jordan Henderson and Stewart Downing are said to have led to the ex-Arsenal and Tottenham employee departing Liverpool. However, that difficult experience has not put the Frenchman off returning to the Premier League one day.
"Out of the last 15 years, I think I've spent only three years in France and all the rest in England," he added.
"This has become my football background, my football culture is in England. I hope that there is a good opportunity somewhere."