It can be a bit complexer but you also have more features (simple but very handy features include things like enums, foreach, lists etc). After using Unity now for about a year (besides current project in gs3d); what I personally miss most in at least Unity compared to gs3d is a more comprehensive written manual/script reference. Yes Unity's online manual/script reference is ok for some quick checks but I miss the extra remarks & tips that gs3d's manual does have. Including Sed's handy command help. Newer engines tend to have more video material but I personally prefer written remarks/tips (faster to quickly look something up again etc).
Also one of the first things I did in monodevelop (and later in visual studio) was changing the text format/style to be more colorful like in Sed, that also helped for me.