Yes the two seem similar from the photos. But is Stein's Pillar also basalt? Anyway I should do a new google research on the climb of Roque Nublo. I was somewhat disappointed with what I got as return earlier this year. It's the national landmark of Gran Canaria and a very popular climbing destination so there must be more.
The routes appear to be heavily bolted. The guy we saw (and cheered) climbing found a bolt every 5 ft. They seemed to be new and solid. Anyway - he cheated - used the bolts to draw himself up. Spaniards! ;-))
"Got tight last night on absinthe and did knife tricks. Great success shooting the knife into the piano. The woodworms are so bad and eat hell out of all furniture that you can always claim the woodworms did it."