I don't think they are that similar. I have the Sirui T1205x with the C10 ball head and its 1lb 14oz all up and is $240 for the combo. The pro master is 2lb 12oz for just the legs and $300.
Do you have the 1205x or the t-025x? Cause the cheapest I've been able to find the 1205x is $275 w/o a head.