When comparing Free Pascal vs V, the Slant community recommends Free Pascal for most people. In the question“What are the best compiled programming languages?” Free Pascal is ranked 1st while V is ranked 4th.
Ranked in these QuestionsQuestion Ranking
Pro Easy to learn
Pro Fast compiler
Very fast, even big programs compile very quickly.
Pro Cross platform
Many target platforms and architectures.
Close to metal while being high level, performance to match C/C++
Pro Fast like C
V is easier than C and fast like C.
V is simple and powerful.
Pro Sum types
V has Sum Types.
V has generics.
Pro Can create multi-OS GUIs
Multi-OS GUI creation is more integrated into the language than others.
Pro Single paradigm
Follows the philosophy that there should be only one way to do something, as opposed to multi-paradigm languages like C++.
V has closures, which gives the user additional options and usefulness.
V is very safe.
Pro Supports concurrency and channels
Can run functions concurrently that communicate over channels.
Pro C Interop
Can import C libraries, structs, and headers.
Compile to many OSes.
Pro Clear syntax
Highly understandable language.
Pro Inline assembly
Can add Assembly code.
Con The author of the language is an expert con artist
The only reason Vlang has any kind of funding is that it has a lot of dummy repositories that promise a lot of performance to the user (like Gitly, UI, Vinix, Viscord, Vbrowser, DOOM written in V, gg ...), when there is nothing to deliver in the first place. The author of V has a history of overpromising things, has claimed that the language has insane features when it didn't. Having a plain look at their README will give the right idea for someone with programming experience.
Con V 1.0 release was planned for December 2019
Con Highly questionable "Fake it till you make it" marketing
Large parts of what they describe as their "key features" on their website is actually goals, not something they currently deliver. It's also something they never will deliver, because it's impossible to do so. The goals themselves are hyped and unrealistic, and until they have a working prototype delivering the claims (which is largely considered to be impossible by the community), the claims are just lies.