Actually it is not marketing time itself that usually has an affect on value, but rather marketing time is an indicator of seller motivations.
Example: a house was on the market for 5 days. What can you tell me about the motivations of the seller and the price paid by the buyer?
Actually, you can not say that the seller was NOT unduly motivated to sell based on that (but you can suspect they were) nor can you assume the buyer paid the highest probable price the property would bring on the open market (from an older definition of value) as it is more likely it was "snapped up quick" by somebody who "saw a deal". It is not conclusive proof one way or the other.
Now look at a property that was on the market for over 3 years and just sold. If the property sold for very close to list price and the price had not suddenly dropped near the end then an appraiser would likely assume it sold at or near market and it would likely be a sound comp as long as it did not show signs of physical distress. In fact, looking at SFRs in a 3 county area I see some CDOMs at 1500+ days (high for sold is 1960 days, high for actives is 2312 days, all from last 3 years). Given OREOs by law must sell within 3 years or less, and likely less then 2 years when first marketed, and in some cases less than 60 days, how can a bank hold onto a property for 6+ years before selling?
Averages were 138 and 175 days respectively (sales, actives) but that INCLUDES REOs (changes to 145 & 177 average CDOM when many REOs, shorts, and ones without RECR excluded). Median DOM for last 12 months is also 10 days higher when said are excluded. Average DOM & CDOM drops like a rock when only REOs are included (median drops by 20-30 days to 45-55 days)
So, if they are the same why do average and maximum CDOM and especially median DOM suddenly drop like a rock?
Do they drop in your market?
Do you analyze DOM & CDOM separately for REOs, non-REOs and combined and look at average, median and maximum DOM and CDOM for each?
You asked "what if they are the same?" so I am asking back, "Are they really the same?"