Which is better Table variable or Union?

I have a stored procedure expecting a $delimited input called type. For example type = '0$2$4$8$16$32'

This sp has to fetch data from different tables based on the type and return in a single select.

Should use table variables or should I go for a Union and IN Clause.

First Scenario

First I break the type variable and insert a record into a table variable InputType.
Take another table variable OutputData

-- get data for all types except 32
Insert into OutputData
Select * from DATA1 t1 INNER JOIN InputType t2
on t1.type = t2.type and t1.type <> 32

-- get data for type 32
Insert into OutputData
Select * from DATA2 t3 INNER JOIN InputType t2
on t3.type = t2.type and t3.type = 32

Select * from OutputData



Second Scenario

I replace the '$' with a ',' and also remove a particular type 32.
-- so @type will be something like '0,2,4,8,16'
Create a dynamic query

EXEC ('Select * from DATA1 t1 INNER JOIN InputType t2
on t1.type = t2.type and t1.type IN @type
UNION
Select * from DATA2 t3 INNER JOIN InputType t2
on t3.type = t2.type and t3.type = 32')

What do you suggest which one will be faster or can you provide a better way to handle the same.

See Erland Sommarskog's web site for an article on this very topic