I would go with the injectable. I found it more effective. Never did the orbit injectable winstrol but I didnt find the caps to be all that great. My run with spectro injectable strol was one of my best cycles ever. Only using 50mg eod.
I've had friends who have used both Orbit Tabs and Inject. Both gave good results. The liquid is very thick so it may get stuck at times when injecting depending what Gauge your using.