No, not even close.
DDR3-1600 RAM has bandwidth of 12.8GB/s, while SATA3 SSDS max out at ~550MB/s, making them at least 25x slower. Faster (and more expensive) PCIe SSDs are able to get to 1.2GB/s, which is still over 10x slower then RAM.
The reason for this is that as users began to demand increased storage capacity for their digital files and as the OS/software began to evolve rapidly, in order to save costs and bring prices down, the industry decided to segment computer memory into higher quality, faster, low(er) capacity, more expensive, volatile storage (RAM), and slower, cheaper, more dense, higher capacity, non-volatile memory (started with "read only memory" ROM chips in the early days, then moved on to platter hard disks, now to solid state drives). As it stands, these are two different types of memories, designed for different things. To simplify it, think of RAM as computer's short-term (i.e. disposable) memory, and storage (be it ROM, an HDD, or an SSD) as long-term (i.e. retained) memory.
If you look closely, you'll see that RAM is way more expensive $/GB than even the most expensive consumer SSDs ($1.2/GB for some Intel drives). 16GB DDR3-1600 RAM still costs $100+, which is $6.3/GB. For a more stark comparison, a 128 SSD can be as low as $90 whereas 128GB of RAM will cost you a hefty $800+.