In my area Two for the Road aired back to back with Alias, 30 Seconds.
Both shows have: Characters with Daddy Problems, under ground facilities and two groups in conflict.

So how did the episodes compare?
1. Both episodes had turncoat traitors motivated by a desire to save their child.
2. With the discovery of Jack’s half sister we learned that both shows have characters with half sisters that grew up unknown to them
3. Both episodes had 2 women killed, one by intent and one by the accidental bad luck of being in the wrong place.
4. Both episodes attempted to burn manuscripts that were snatched out of the fire.
5. Manuscript on Lost - Bad Twin: Document on Alias contained a picture of a person who could be Sidney’s twin, plus through genetic manipulation Ana Espinoza was made in Sydney’s “bad” twin.
6. Both shows now have an infant cast member & they are roughly the same age.

Anyone see further similarities between Lost/Two For the Road and Alias/30 Seconds?

It's probably because they're both at least co-created by JJ; people tend to put similar themes in their seperate works, both consciously and subconsciously.

I watch both Lost and Alias and never thought of any of that. Those are pretty good similarities

its funny how alias ends with a big white ALIAS, very similar to lost ending

It's probably because they're both at least co-created by JJ; people tend to put similar themes in their seperate works, both consciously and subconsciously. Disfunctonal families with Daddy Problems would be a similar theme. Something like a half sister of a main character being raised without knowing her sibling gets a little too detailed for me to see it as just a similar theme.