Which request would be better for swap request 1 or request 2
Request 1:
select CEILING(CONVERT(decimal,Count(*))/@PageSize) as TotalPages FROM Table
Request 2:
Select (Count(*) + @PageSize - 1)/@PageSize as TotalPages FROM Table
Basics on your sample I will go for request 2
But technically speaking, they both have the same performance in SQL Server, try to execute them and see the execution plan.