This has already been asked...
VTCT is not a qualification....VTCT stands for Vocational Training and Charitable Trust. They are an awarding body, who offers qualifications. They offer NVQ qualifications as well as others.
NVQ stands for National Vocational Qualification, and is a qualification in your chosen subject, at your chosen level (2, 3, 4 etc). NVQs are offered by lots of different awarding bodies, such as VTCT, City & Guilds, ITEC, CIBTAC, CIDESCO etc... NVQ Level 3 beauty should be virtually identical no matter which awarding body your chosen college uses. There are some variations, but NVQ 3 is generally the same across the board...
You can do your NVQ level 2 with one awarding body (VTCT, for example), and your NVQ3 with another if you choose to. At the end, you will still have NVQ2 & 3.
I hope this helps you understand how qualifications work a little better...