Hi Oleg2010.
I have 2 of the Vanguard Alta pro 263s and i absolutely love them, easy to say not having that much experience of other brands.
The 263 is super sturdy and the 90 degree on the center column is easy to setup although this requires the removal of the center column which only takes a couple of seconds, looking at the Manfrotto, the center column looks to pivot to 90 degrees in one smooth movement which is really cool.
There is quite a bit of difference in the weight between both units with the 263 weighing in at 2.6kg with the GH100 pistol grip head and the Manfrotto at 2kg with no head.
My first tripod was a Manfrotto with a pistol grip head unfortunately for me though i did not have a great customer service experience with the company, the pistol grip broke within 9 months and Manfrotto do nothing for me - bummer.
My first 263 developed a problem with a collet in the center column after only a few uses, my first email to Vanguard was to voice my disappointment considering how old the tripod was and could they sort it out, i received an email within a couple of days from the finance director apologising and that they would send me out a replacement.
About one week later i received the replacement part, or so i thought, they sent me a replacement Tripod and head free of charge and told me to keep the other one.
Now, i would not expect this service from any company but this blew me away and made me a customer for life.