Sole stiffenss - Scarpra SL M3/Asolo TPS 535

Gday all,
I am looking at getting a new pair of boots as my last pair died doing the W Arthurs over Easter, I have narrowed it down to the Scarpra SL M3s and Asolo TPS 535s both are very comfortable, however I am finding it hard to justify the extra $175 for the SLs. I also intend to try out the Zamberlan Vioz GTs. There appeas to be quiet a few people with the SLs on here but no real in-depth info.
The SLs appear to be of a superior build quality? (i.e. heavier duty leather and chunkier sole) over the Asolos and this is I guess reflected in the weight with the Sls being some ~300grms heavier a pair.
My main concern with the SLs is the stiffness of the midsole and how this really affects walking, they felt good to walk in but it's a lot different to the very soft and flexable soles I am used to and actually being out in the bush rather than walking up and down some stairs, I understand that stiffer soles have a good advantage on rocky terrain but how do people find them on flatter terrain? not that we have much of that here anyway
I have also received mixed opionions about whether or not the soles/leather when broken in will allow a little more flex of the foot. Does anyone who has owned a pair have any opinion as to wehther this is the case?
Any insights from people who have owend either models would be greatly appreciated.
Michael.
I am looking at getting a new pair of boots as my last pair died doing the W Arthurs over Easter, I have narrowed it down to the Scarpra SL M3s and Asolo TPS 535s both are very comfortable, however I am finding it hard to justify the extra $175 for the SLs. I also intend to try out the Zamberlan Vioz GTs. There appeas to be quiet a few people with the SLs on here but no real in-depth info.
The SLs appear to be of a superior build quality? (i.e. heavier duty leather and chunkier sole) over the Asolos and this is I guess reflected in the weight with the Sls being some ~300grms heavier a pair.
My main concern with the SLs is the stiffness of the midsole and how this really affects walking, they felt good to walk in but it's a lot different to the very soft and flexable soles I am used to and actually being out in the bush rather than walking up and down some stairs, I understand that stiffer soles have a good advantage on rocky terrain but how do people find them on flatter terrain? not that we have much of that here anyway

I have also received mixed opionions about whether or not the soles/leather when broken in will allow a little more flex of the foot. Does anyone who has owned a pair have any opinion as to wehther this is the case?
Any insights from people who have owend either models would be greatly appreciated.
Michael.