Dear Jan,
 
Thank you for your question.  I can not really comment on the brands or mattresses you have mentioned and without a model name, I can't do a comparison for you.
 
At your bodyweights, I would recommend a soft spring tension.  If you were to purchase a mattress with say a medium spring tension, your light body weight would not compress the springs in the mattress and the only thing to give you support would be the upholstery layers.  Look at a mattress in two parts – SUPPORT (Springs) and COMFORT (Upholstery).  Spring tension is based solely on your bodyweight and the upholstery is based on personal preference and sleeping habits.
 

 
With our Artisan range, constructed with natural fibres, can be made with the spring tension you require.  Natural fibres also offer a cool sleep surface.  Different natural fibres are used to create the different 'feel' of the mattresses in the different models.
 

 
Please call our friendly team on 0161 437 4419 to discuss your preferences for a more tailored recommendation. Our office hours are 8 am - 8 pm Monday to Friday and 10 am - 4 pm Saturday and Sunday.
 
Kind Regards
Michaela