As a rule of thumb, SOIC (SO) packages are usually larger than TSOP (TSSOP)
(SSOP) The "T" stands for Thin,

Both are hard to prototype with as they are.

First Digikey sells a SMT Universal SOIC ZIF test socket for SOIC devices.
I just looked and it is $151.94 (Kaf Kaf...) Digikey PN 44-547-11 (Page 123)

BUT!!

Digikey sells a DIP adapter for the different pin count SOIC devices.  Page
123.  They range from $6.00 to $10.00 and then you can use a simple socket
to prototype with.

While your there pick up some solder wick and a soldering iron with a really
small tip  :-P

Digikey
1-800-344-4539

NOTE:
SOIC = Small Outline IC
TSOP  = Thin Small Outline Package
TSSOP = Thin Small Shrink Outline Package - Really darn small !


>I plan on prototyping with some Atmel DataFlash parts this summer. They
>only come in SOIC and TSOP packages. Which is easier to socket for
>prototyping?
>
>BAJ
>