I noticed my cars emissions were different than other cars' today. It was night, cold (about 50 degrees). I was sitting at a stop light idling and my smoke looked like stean, greyish-white and somewhat abundant. The thing that makes me wonder is that I looked at other cars and I couldn't even see anything coming from the exhaust... I just put a new cat on about 2 weeks ago. Im also getting some cels, which hopefully I will get fixed this weekend. Is this abnormal?

The car is a 93 eg with a gsr swap. Thanx