Take this one
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Titanium (ROMs for raw speed!)
This is a minimal ROM version without Sense in it. It's used primarily for people that like to customize the default 6.5 homescreen (Titanium)
You can use it to install alternate homescreen interfaces like SPB Mobile Shell, etc
Very low memory footprint and good battery life, but very simple and lacks a lot of features that you would otherwise have available in Sense...
Looking at the download folder you will find two core versions of the ROM.
A 21916 Build which is the most reliable and bug free release. It has the Start menu button at the top left corner. This build uses the same stock system that came with your device. This is usually the fastest and most stable build, but it's also the least fancy
A 29007 Build that's the latest in Microsoft's development with the Start menu button at the bottom left corner and big softkeys, making it all very "finger friendly". These builds reflect the latest cutting edge technology from Microsoft. Most people choose this build... Why else would you install a custom ROM ?
Have Fun