Is B4A close to PureBasic?

Is B4A close to PureBasic? What are the similarities and what differences (in syntax)?

Without taking a deeper look: All Basic dialects are very similar (like VB.net and B4J). So it's not worth to compare the syntaxes (will be >95% the same).

Better: All B4x versions are compatible so you can reuse the code with some minor changes. Example: B4A-App. Except of handling views you can take your subs and use it in B4J and vice versa. This is the biggest plus. All libs basic libs are compatible.

And... B4J is for free!

I may add that you can create your own B4X cross-compatible code modules to use in either of the 3 major B4X products (B4R is in a class of its own)