Choosing Between Grundfos Alfa2 25-40 Pump With or Without Autoadapt for 100m2 Heating

Hello. I am currently selecting a central heating pump. A small one-story building to be heated 100m2. The installation consists of 4 radiators and 4 underfloor heating circuits. There will be no control of thermostatic valves, only constant flow.
The pump I am planning to buy is grundfos alfa 2 25-40. And here comes a question that I can't find the right answer to. Does it make sense to pay extra for a pump with the autoadapt function or with this type of installation it simply does not make sense to buy an ordinary alpha 2 L 25-40 pump? Apparently, with a constant flow, the autoadapt function does not make any sense, but the opinions on the Internet are divergent. What do you think?

Added after 6 [hours] 13 [minutes]:

So nobody nothing ...?

If there are no thermostats on the radiators but a constant flow, then the autoadapt is unnecessary

In terms of maximum power, as I remember, in the case of 25-40 2L has 22W, and the newest 2 18W, so the difference is basically negligible, but for someone else it is about 18% less.
I do not remember if there were any significant differences in the characteristics of both pumps but 2 has a useful feature in the form of flow indication in m3, which may be useful when verifying or potentially setting the flows.
It is true that you plan radiators without thermostatic valves, but practice will show how well your installer / designer will perform the installation correctly.
Anyway, it all depends on the amount of the surcharge, because as I was exploring the pump market, the difference in price between both models was about PLN 50. With such a difference, having your dilemma, I would personally choose the more expensive 2.
2L has no autoadapt but has proportional modes, so the pump can also modify its performance depending on the installation resistance.
But I do not know if it is useful when connecting radiators to an underfloor heating system or if it complicates the matter more.

In my case, the difference between one and the other pump will be at least PLN 150. It is also not really a fortune and it is not a decisive factor in choosing a pump. Therefore, I am looking for an answer which of the two will be a better solution for me.

Assuming that you will mainly be a floor heater and perhaps you will never have the opportunity to take advantage of the "advantages" 2, an additional PLN 150 is unprofitable for me.
When I looked at the pumps last summer, it was a rash of "cheap" pumps, because Grundfos offered promotional two-packs, which traders dismantled and sold separately, so the new 2 with auto adaptation could be plucked for around PLN 450 and then I would not have a dilemma what to choose. I don't know the current prices.
If you can, buy the latest production, the casing has the production date coded, as I associate it was PC: XXXX, where two digits mean the year and the next 2 digits mean the week number from a given year. Some people sell some storage deck chairs, so it is worth paying attention to such details, because eg 2 is "old", and in 2015 there was a "new" 2 looking identical, so the difference is visible only after the production date. To be sure of buying a new 2, it should have a production year in the worst case 2016.
As far as I know, there is no division into the new and old version at 2L.

I have two Grundfos ALPHA 1 pumps. One died after a year, the other after 1.5 years. They did not accept any guarantees. They found that the pumps were running dry. It is not possible that the pumps were installed in the return of a two-story house, and the stove is a Defro pellet stove with a burner. The pumps always had water.

So I advise against any purchase from Grundfos. I have not made this mistake for the second time.