Both Lindsay and Ali stepped out for a shopping trip on Thursday rocking totally different looks -- but which sister has the better jeans?

Flashing hew newly-dyed signature red locks, Lilo donned a long pair of loose-fitting bellbottoms that completely covered her shoes, but still hugged her sexy curves in all the right places.

Little sister Ali, on the other hand, opted for a sleeker look with a pair of skintight high-wasted skinnys that showed off her stylish black platform boots.

The Lohan girls both looked lovely in their own right, but if you had to choose one ...