The advantage of having an account on www.fingerstyle-tabs.com is that you are able to download your purchased tabs anytime you like and as many times you like.
There will be no price difference except that you are getting one tab for free when buying 2 tabs via an account.
When you buy one tab with the ´One Click Buy´ button, you can pay directly and download your tab. There´s no hassle of creating and activating an account.
The advantage of having an account is that you will be able to download an updated tab for free. Once in a while I have new ideas of fingering etc. and I will update a tab and publish it at the website. Than you'll receive an e-mail message.