I have had better results with chip budding vs cleft. But i dunno why. I think both can be equally succesfull. If you have enough scionwood. You can always cleft the end piece of the rootstock and do a chip bud below it. Is also a good way to practise chip budding 
T-bud is probably slightly easier to execute, knife wise. However it can be tricky timing when the bark is slipping. Not only time of year, but also age of rootstock and how you treated it.
Chip budding is much more multi purpose (summer winter, whenever ! Dormant scion or non dormant scion 
)
If your gonna train yourself to learn another graft besides cleft. I would advise chip bud. (and use parafilm M for chip budding)
Plums are almost as easy to graft as pears and apples. So you can graft em fully dormant. (even before the rootstocks leaf out)
Peaches and nectarines i have limited experiance with. But if read a lot, that they like higher temps.
excelent chip bud vid
His knifework somtimes is a little dangerous. I think because he wants to get in in the camera frame. Locking your thumbs helps a lot, especialy when doing bench grafts.
This is also a nice vid for chip budding. A little long. But might be a nice pace for a newcomer.
