Too materialistic evaluation?

[Remiem]

Tactics NR 41316
1...Qxe5+ 2.Qg3 Qxg3+ 3.Kxg3 b5 4.f4?! Ke7 5.Nc8+ is considered wrong, though the white knight is trapped.

Tactics NR 27486
1.Nxc5 d6xc5 2.Nxc5 Rb3 3.Qc2 Qa5 (4.Nxb3 Qb6+ 5.c5 Qxb3) is considered wrong.

[Zuril]

Yes the chess engine included in the applet is optimized for tactics so it give more importance to the material.