As the article states both nice and let your preferences guide you. Personally if I'd go for a 2-in-1 I'd select a convertable, better fits me and what I do.

"The rise of 2-in-1 notebooks

2-in-1 notebooks are becoming increasingly popular with consumers, especially in today’s mobile-centric world. Consumers want mobility and flexibility, and 2-in-1 notebooks provide just that. Today, just about every major notebook manufacturer has a 2-in-1 notebook in their lineup.

2-in-1 notebooks generally come in two-forms: convertibles and detachables. Convertible notebooks are notebooks whose keyboards can be rotated and folded behind the display for a tablet usage mode among others. Detachable notebooks, on the other hand, are notebooks who have detachable keyboards, allowing the display to be unfastened and be used as a tablet while ditching the extra bulk of the keyboard.

As a rule, convertible notebooks are more convenient, because they are usually larger and have more connectivity options. But because of this, they are usually less portable and more unwieldy when used as a tablet. On the other hand, detachable notebooks tend to function as tablets better, but they usually have lesser ports and can suffer from cooling issues because of their smaller form factor. Both types of notebooks have their pros and cons and it isn’t a simple matter of which one is better than the other. It is very much dependent on individual preferences and usage scenarios."

sg.news.yahoo.com/2-1-notebook-mega-shootout-acer-vs-asus-133019581.html