Namibia features area control and a novel commodity chart with supply/demand/price being factors all manipulated by the players. It also includes an auction for turn order which is easy to get sucked into though not without its risks as you convert money into victory points at specific stages in the game at differing conversion rates.
A note about components: the game board needs to be bigger if not only slightly as the board quickly fills up and it gets quite annoying and difficult to see what is where.
Struggle of Empires is a big game of diplomacy and control. Auction for alliances is a major part of the game and an excellent mechanism; you typically want to be allied with your bigger opponents. Play with 5 or 7 and be very familiar with all the cards.
This is a great, no-luck, market supply/demand game. Still digesting but there is a great game here. We played with v2 rules on commodity packages and trading - namely, the ability to buy/sell 1, 2 or 3 cubes in one action during the trading phase. The drawback is the slow trading phase but it's not that bad; it will speed up with experience.