In my last post, I noted that the Burundian ruling party (CNDD-FDD) does not mention the economy on their website. By comparison, the ruling party in the DRC (PPRD-DRC) mentions "économie" 22 times on their website (google search "économie site:pprd-rdc.net"). The Rwandan ruling party (RPF) mentions "economy" 268 times on their website (search "economy site:rpfinkotanyi.org").
The 2013 GDPs per capita of the countries (in purchasing power parity) are $1608 (Rwanda), $877 (Burundi), and $655 (DRC), under IMF estimates here. Now, it's possible that richer countries have more economy to discuss, but surely that can't explain the massive gap in the amount of discussion between the Rwandan and other governments. Another explanation is that the Rwandan government has been more focused on economic matters, and it is showing in the national income.