Ate at these two places recently. Both are vietnamese restaurants in Columbia that serve both Pho and regular vietnamese entrees. At both places, I had the lemongrass beef, pork, and chicken over rice. I found the version at Pho Dat Tan more tasty and better prepared. The grilled meats were more tender and the chicken had a nice garlicky texture. The same dish at An Loi was slightly bland and the chicken was not marinated with lemongrass as advertised, but overcolored with red dye. Also, I ordered the summer rolls at PDT and they were ok, although the noodles inside were dry. I ordered the spring rolls at AL and it was a deep fried spring roll, but not hot and fresh off the deep fryer, but rather warm. Therefore, I could only conclude that it was sitting under a heat lamp.
A friend of mine had pho at both places, and An Loi seemed to have the better pho although I did hear one customer complain at An Loi that her portion of noodles in her bowl was smaller than she could recall. I overheard her say that she's been there many times and couldn't remember the portions being so little. Her reply was that the prices have been lowered, and so have the portions.
I also had bubble tea at both places, and PDT's version had tapioca pearls that were mushy and soggy, while AL's version was a bit better, although filled with ice. At AL, I had the thai iced tea with the pearls. AL has more of a cafeteria style looking interior while PDT has white table cloth during lunch time. Prices were about the same for both places.
For the poster 2 weeks ago that inquired about Bun, An Loi has Bun.
Oh yeah, avoid the indian lunch buffet at the Akbar restaurant that's in the same strip mall as PDT. It was pretty tired and nasty. I love butter chicken, and there version on the buffet table was pretty tasteless and all of their chicken dishes were dry, which to me meant that they've been recooked many times.