Even if one of those routines seems to work better this time around, it doesn't mean you should disregard the others. It is good to have different tools in your tool box. Body part splits can be great if you are beat up and looking to get in some more volume work, where as Starting Strength is an excellent way to build a firm base and a great program to come back to again when you need to keep things simple.
Regarding your caloric intake, remember as workout demands change and bodycomp changes (hopefully with some lean mass gains) that number may need to be adjusted.
That said, enjoy your experiment. I would actually recommend milking the initial phase for all it's worth and only moving on to upper/lower once you seriously plateau on the big lifts.
James 1:16-17 ESV
Do not be deceived, my beloved brothers. Every good gift and every perfect gift is from above, coming down from the Father of lights
With God's help...Mens sana in corpore sano